CN203848463U - Negative pressure leakage-proof laminar flow cover - Google Patents
Negative pressure leakage-proof laminar flow cover Download PDFInfo
- Publication number
- CN203848463U CN203848463U CN201420181536.3U CN201420181536U CN203848463U CN 203848463 U CN203848463 U CN 203848463U CN 201420181536 U CN201420181536 U CN 201420181536U CN 203848463 U CN203848463 U CN 203848463U
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- China
- Prior art keywords
- air
- negative pressure
- shell
- laminar flow
- inner casing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004378 air conditioning Methods 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Ventilation (AREA)
Abstract
The utility model relates to a negative pressure leakage-proof laminar flow cover which comprises a laminar flow cover outer housing, an inner housing and a fluid bath sealing filter. The inner housing is sealed on the bottom face of the inner cavity of the outer housing, the fluid bath sealing filter is arranged under the inner housing, the fluid bath sealing filter and the bottom of the inner wall of the outer housing form sealing match, the bottom of the outer housing under the fluid bath sealing filter is an air outlet face, a negative pressure pipe is arranged on the outer casing, and an air supply pipeline is arranged at the upper end of the inner housing. When an air conditioning system runs, a positive pressure cavity is formed between the fluid bath sealing filter and the inner housing, and a negative pressure cavity is formed between the outer wall of the inner housing and the inner wall of the outer housing. By adopting a method for adding the negative pressure cavity in the laminar flow cover, air leaked from the positive pressure cavity of the inner housing and a clean room is led to the negative pressure cavity and then pumped back to an air conditioning system air return pipeline through a negative pressure pipeline connected with the negative pressure cavity, and accordingly air leakage brought by poor sealing of a laminar flow cover box body is effectively prevented from influencing safe running in the clean room.
Description
Technical field
The utility model relates to a kind of negative pressure anti-leak laminar flow hood.
Background technology
Due to A level toilet's cost and operating cost too high, therefore, generally adopt the mode by laminar flow hood is set in part, low level toilet to realize the A level cleanliness factor that emphasis station requires in pharmaceuticals industry, so both avoided the high of cost and operating cost, meanwhile, can meet again the requirement of production technology.
For requiring the large place of Area comparison, A level district, can use that laminar flow hood is multiple to be merged or multiple independent use, consider its operation and temperature, wet control, generally adopt airduct to concentrate to send, air return method realizes.As shown in Figure 1.
The air that air-conditioning box is disposed is sent into laminar flow hood casing through ajutage, under hydrostatic pressure, overcome the resistance of terminal high efficiency particulate air filter, flow velocity with 0.45m/s ± 20% enters toilet, form local way flow, reach A level cleanliness factor in laminar flow hood control area, then by the return air inlet of toilet's sidewall, flow back to air-conditioning box via return air airduct.
Can find out from diagram, because terminal high efficiency particulate air filter exists certain resistance (200-400Pa), being lifted on laminar flow hood casing in toilet actual is a malleation static pressure casing.Meanwhile, enter laminar flow hood and not yet only filtered by first effect and medium effeciency filter in air-conditioning box through the air before terminal high efficiency particulate air filter, the air after it filters far can not meet the requirement of toilet's cleanliness factor.Therefore, any leakage of laminar flow hood casing, all can will bring toilet into without the air of high efficiency particulate air filter processing, and this will pollute, and has a strong impact on safety and the quality of product.
Consider cost and manufacture craft, laminar flow hood casing is normally formed by thin plate (1.2mm～1.5mm) bending assembling welding, because splicing seams is very long, adopt the relatively reliable sequential welding mode of sealing to weld, can cause very large distortion, and can not have leak source, this is a challenge for welder.Therefore, now generally adopt spot welding to add the mode processing of fluid sealant, but equally also have fluid sealant season cracking, inefficacy and the problem such as poorly sealed, also there is no so far perfect solution.
Utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, a kind of negative pressure anti-leak laminar flow hood is provided, effectively avoid affecting because of the bad air leaks forming of laminar flow hood box sealing the safe operation of toilet.
The utility model solves the technical scheme that its technical problem adopts: a kind of negative pressure anti-leak laminar flow hood, it is characterized in that, comprise laminar flow hood shell, inner casing and flume seal filter, described inner casing setting coordinates in the enclosure and with outer casing inner wall bottom surface is airtight, flume seal filter is arranged on inner casing below and flume seal filter and the formation of outer casing inner wall bottom and is sealed and matched, the outer casing bottom of flume seal filter below is outlet air surface, on shell, be provided with the negative-pressure pipeline being connected with air-conditioning system air return pipeline, inner casing upper end is provided with the air supply duct being connected with air conditioner system air blast pipeline through shell,
When air-conditioning system operation, between flume seal filter and inner casing, form malleation cavity, between inner casing outer wall and outer casing inner wall, form negative pressure cavity, described air supply duct is connected with inner casing and is communicated with malleation cavity through shell, negative pressure cavity, and the negative-pressure pipeline arranging on described shell is connected with negative pressure cavity; The bottom outlet air surface of described air supply duct, inner casing, flume seal filter and shell has formed the air-supply air-flow flow path of laminar flow hood.
Further, described flume seal filter is arranged on through sealed knife frame-saw on the bottom surface of outer casing inner wall, between sealed knife frame-saw and outer casing inner wall bottom surface, use the embedding of flume seal glue, described inner casing is fixed on sealed knife frame-saw, the composition surface of inner casing and sealed knife frame-saw adopts and is intermittently welded to connect, and uses silica gel sealing processing.
Further, in described negative-pressure pipeline, be also provided with for prevent air-conditioning system shut down after in return air duct airflow reflux enter the check-valves of negative pressure cavity.
Further, in described air supply duct, be provided with volume damper.
The beneficial effects of the utility model are: by set up the method for negative pressure cavity in laminar flow hood, utilize air from positive pressure side to the mobile characteristic of negative pressure end, the air of the malleation cavity from inner casing and toilet's leakage can be caused in laminar flow hood negative pressure cavity, the negative-pressure pipeline that warp joins with it is again withdrawn in air-conditioning system air return pipeline, thereby effectively avoids affecting because of the bad air leaks forming of laminar flow hood box sealing the safe operation of toilet.
Brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is that traditional laminar flow covers on and in toilet, uses state diagram;
Fig. 2 is the structural representation of the utility model negative pressure anti-leak laminar flow hood;
Fig. 3 is that the utility model negative pressure anti-leak laminar flow hood is used state diagram in toilet.
Wherein: 1, shell, 2, flume seal filter, 3, air supply duct, 31, volume damper, 4, inner casing, 5, negative-pressure pipeline, 51, check-valves, 6, sealed knife frame-saw, 7, negative pressure cavity, 8, malleation cavity, 9, return air duct, 10, return air inlet.
Detailed description of the invention
By reference to the accompanying drawings the utility model is further described now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present utility model in a schematic way, and therefore it only shows the formation relevant with the utility model.
As shown in Figure 2, a kind of negative pressure anti-leak laminar flow hood, comprise laminar flow hood shell 1, inner casing 4 and flume seal filter 2, on shell 1, be provided with the negative-pressure pipeline 5 being connected with air-conditioning system air return pipeline, inner casing 4 upper ends are provided with the air supply duct 3 being connected with air conditioner system air blast pipeline through shell 1, in air supply duct 3, be provided with volume damper 31, inner casing 4 is arranged in shell 1 and inwall bottom surface is airtight coordinates with shell 1, flume seal filter 2 is arranged on inner casing 4 belows and flume seal filter 2 forms and is sealed and matched with shell 1 inwall bottom, shell 1 bottom of flume seal filter 2 belows is outlet air surface.
When air-conditioning system operation, between flume seal filter 2 and inner casing 4, form malleation cavity 8, between inner casing 4 outer walls and shell 1 inwall, form negative pressure cavity 7, air supply duct 3 is connected with inner casing 4 and is communicated with malleation cavity 8 through shell 1, negative pressure cavity 7, and the negative-pressure pipeline 5 being connected with air-conditioning system air return pipeline arranging on shell 1 is connected with negative pressure cavity 7.The bottom outlet air surface of air supply duct 3, inner casing 4, flume seal filter 2 and shell 1 has formed the air-supply air-flow flow path of laminar flow hood.
By set up the method for negative pressure cavity 7 in laminar flow hood, utilize air from positive pressure side to the mobile characteristic of negative pressure end, the air of the malleation cavity from inner casing 4 and toilet's leakage can be caused in laminar flow hood negative pressure cavity 7, the negative-pressure pipeline 5 that warp joins with it is again withdrawn in air-conditioning system air return pipeline, thereby effectively avoids affecting because of the bad air leaks forming of laminar flow hood box sealing the safe operation of toilet.
Flume seal filter 2 is arranged on through sealed knife frame-saw 6 on the bottom surface of shell 1 inwall, between sealed knife frame-saw 6 and shell 1 inwall bottom surface, use the embedding of flume seal glue, inner casing 4 is fixed on sealed knife frame-saw 6, inner casing 4 and sealed knife frame-saw 6 composition surfaces adopt and are intermittently welded to connect, and use silica gel sealing processing.
In negative-pressure pipeline 5, be also provided with for preventing that the interior airflow reflux of air-conditioning system rear return air duct 9 out of service from entering the check-valves 51 of negative pressure cavity 7, this check-valves 51 is mainly in order to prevent that negative-pressure pipeline 5 from occurring that air pours in down a chimney and pollutes toilet.
As shown in Figure 3, air-conditioning system air after treatment enters in the malleation cavity 8 in inner casing 4 through air supply duct 3, flowing through before flume seal filter 2, the gap of the poor sealing that air can may be existed by inner casing 4 because of pressure reduction is infiltrated in negative pressure cavity 7, the gap of the poor sealing that the air in toilet also can may exist because of the former reason shell 1 of pressure reduction is infiltrated in negative pressure cavity 7, owing to connecting negative-pressure pipeline 5 on negative pressure cavity 7, the air (being the air of filtered) that therefore this part malleation cavity 8 from inner casing 4 and toilet can be leaked to laminar flow hood negative pressure cavity 7 is drawn in return air duct 9 by negative-pressure pipeline 5, return air duct 9 is connected with the air return pipeline of air-conditioning system, the air leaking can flow back to again into air-conditioning box, avoid it from the casing gap of laminar flow hood poor sealing, to flow out.Enter in toilet through the bottom outlet air surface of shell 1 through flume seal filter 2 filtered airs streams, form needed clean gas flow, then the return air inlet 10 in being arranged on toilet is back in return air duct 9, then flows back to air-conditioning box.Like this, by set up the method for negative pressure cavity 7 in laminar flow hood, just can effectively solve air leaks that laminar flow hood casing forms because of poor sealing affects the problem of toilet's safe operation.
Taking above-mentioned foundation desirable embodiment of the present utility model as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this utility model technological thought, carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on description, must determine its technical scope according to claim scope.
Claims (4)
1. a negative pressure anti-leak laminar flow hood, it is characterized in that, comprise laminar flow hood shell (1), inner casing (4) and flume seal filter (2), described inner casing (4) be arranged in shell (1) and with shell (1) airtight cooperation of inwall bottom surface, flume seal filter (2) is arranged on inner casing (4) below and flume seal filter (2) forms and is sealed and matched with shell (1) inwall bottom, shell (1) bottom of flume seal filter (2) below is outlet air surface, on shell (1), be provided with the negative-pressure pipeline (5) being connected with air-conditioning system air return pipeline, inner casing (4) upper end is provided with the air supply duct (3) being connected with air conditioner system air blast pipeline through shell (1),
When air-conditioning system operation, between flume seal filter (2) and inner casing (4), form malleation cavity (8), between inner casing (4) outer wall and shell (1) inwall, form negative pressure cavity (7), described air supply duct (3) is connected with inner casing (4) and is communicated with malleation cavity through shell (1), negative pressure cavity (7), and the upper negative-pressure pipeline (5) arranging of described shell (1) is connected with negative pressure cavity (7); The bottom outlet air surface of described air supply duct (3), inner casing (4), flume seal filter (2) and shell (1) has formed the air-supply air-flow flow path of laminar flow hood.
2. a kind of negative pressure anti-leak laminar flow hood according to claim 1, it is characterized in that: described flume seal filter (2) is arranged on through sealed knife frame-saw (6) on the bottom surface of shell (1) inwall, between sealed knife frame-saw (6) and shell (1) inwall bottom surface, use the embedding of flume seal glue, described inner casing (4) is fixed on sealed knife frame-saw (6), the composition surface of inner casing (4) and sealed knife frame-saw (6) adopts and is intermittently welded to connect, and uses silica gel sealing processing.
3. a kind of negative pressure anti-leak laminar flow hood according to claim 1, is characterized in that: in described negative-pressure pipeline (5), be also provided with for prevent air-conditioning system shut down after the interior airflow reflux of return air duct (9) enter the check-valves (51) of negative pressure cavity (7).
4. a kind of negative pressure anti-leak laminar flow hood according to claim 1, is characterized in that: in described air supply duct (3), be provided with volume damper (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181536.3U CN203848463U (en) | 2014-04-15 | 2014-04-15 | Negative pressure leakage-proof laminar flow cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181536.3U CN203848463U (en) | 2014-04-15 | 2014-04-15 | Negative pressure leakage-proof laminar flow cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203848463U true CN203848463U (en) | 2014-09-24 |
Family
ID=51561473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420181536.3U Expired - Lifetime CN203848463U (en) | 2014-04-15 | 2014-04-15 | Negative pressure leakage-proof laminar flow cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203848463U (en) |
-
2014
- 2014-04-15 CN CN201420181536.3U patent/CN203848463U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |
|
| CX01 | Expiry of patent term |